Stereoscopic film or plate pack



May .14, 1929. E. P. CRESSLER STEREOSCOPIC FILM OR I LATE PACK Filed Feb. 12, 1926 Edward R Cray/(am My atto 'Patented May 14, 1929.

1 EDWARD r. GRESSLER, or NEWTON, KANsAs.

STEREOSCOPIC FILM R PLATE PACK.

Application med February 12,1926. Serial No. $7, 7

This invention relates to packages of sen-' sitizedfilms or plates for use individually in dental X-ray work.

The primary object of the invention is the 6 provision of a double film pack whereby, in stereoscopic work, for. instance, two views may be taken with the same pack by merely inverting the pack in its holder, and the two views may be retained together untilthey 10 are to be developed.

Another object of the invention is to provide a double film pack including two single 7 packs separated and partially encased" by metal or other materialimpervious to Roentgen rays whereby the film in one of the packs will be unaffected by the rays during the exposure of the film in the other pack. 7

Another object of the invention is to provide a film pack for individual use which will be simple to manufacture, which will be sufficiently waterproof for'all practical purposes, and which is sufficiently flexible to permit bending thereof as needed.

Another object of the invention is to provide a pack of this character embodying means whereby the pack may be quickly and easily opened and the film or films removed therefrom. a

A further object of the invention is to pro vide a pack-opening device normally disposed partially within the pack and having pivotal connection with the film or films whereby it serves also as a means for withdrawing the films from the pack and forholding them during developing operations.

Vith these and other objects in view, as will become apparent as the description proceeds,

the invention consists of the novel features of construction, combinations of elements, and arrangements ofparts hereinafter-t0 be fully described and pointed out in the claims. A full and complete understanding of the invention maybe obtained from a consideration of the following detailed description, taken in connection with the accompanying drawings forming a part of thedisclosure, it' being understood that while the. drawings show certain practical embodiments of the invention, the latter is not to be confined to theshowing thereof but may be changed or modified so long as such changes and modifications mark no material departure from the salient features of the invention as here inaftcr described and claimed.

In these drawings: Figurel is a view in top plan of a film pack embodying certain features 'of my inventu e-concept p Fig. 2 1s a v1ew 1n-s1de elevatlon thereof;

Fig. 3. is a fragmentary view in plan thereof illustrating the pack opening and 1 -1,713,330- UNITED STATES PATENT OFFICE.

film-handling element in extended position;

Fig. 4 is a longitudinal sectional View through the pack, taken on line 4- 1 of i Fig. 5 is an enlarged fragmentary view illustrating the manner in which the opening strip attached to the film;

Fig. 6 is a fragmentary view in plan of a modified form of pack-opening device; I Fig. 71s a similar vlew ofanother mod fied form of opening devlce;

Fig. 8 is a view in longitudinal section of a double film pack for stereoscopic work;

Figs. 9 and 10 are fragmentary sectional views illustrating other forms thereof, and Fig-11 is a perspective view of the double film pack illustratedin Fig. 10, one of the film packs being removed therefrom and the pack opened by means of the opening and handling device. 1

Referring to the drawings, the reference,- character 1 designates, generally, a film holder for stereoscopic X-ray work comprising, in this instance, a double container 2 formed up of lead or the like material to provide a central plate or partition 3 having integral flanges 4; and 5 extending substantially at right angles from the periphery of the opposite faces of the partition to constitute cuppacks7. I a f v The flanges 4 andv 5,as shown in Fig. 8, are .both curved and meet to define a groove 8 therebetween which adapts it particularly well for use in a'holder as shown and de-. scribed in applicants .co-pending applica to Roentgen rays, one or more (one onlybeing shown) sheets 12 of sensitized film, and

like chambers 6 to receive a pair of single film,

a sheet 13 ofmetallic foil,such as lead, all of these sheets being ofthe same size.

Around the enclosed leaves enumerated above is placed a wrapping sheet 1%, of opaque paper, of greater area than the enclosed sheets. This overlies the sheet 11,. and its edges are bent up around the edges of the contained sheets at and bent to overlie cient to insure a firm andreliable adherence.

Preferably and as shown, each film 12 within the pack 7 is provided with means whereby it may be withdrawn from the pack, which means also serves as a pack-ripping or opening element. This means, as shown in Figs. 1 to 5, inclusive, and 11 comprises a thin flexible metallic strip 19, preferably pervious to Roentgen rays and longer than the film, pivotally attached to the film adjacent one corner thereoi by means of a struck up lug passing through an aperture 21 in the film and bent down into parallelism therewith. In order to identify the films, for instance to determine which of the films from a pack as shown in Fig. 8 should be positioned to the left and which to the right for stereoscopic observation, suitable characters or marks 22 designating rights and lefts are provided on the opening strips either by application of paint containing any metallic substance impervious to X rays or a suitable piece of metal impervious to X rays thereto. The strips 19, on the other hand, may themselves be of base metal and have suitable characters or marks stenciled therein. The single packs Twill, of course, require an exterior marking corresponding to that on the film or films contained therein.

In forming the single pack 7, the free end 23 of the strip 19 punctures and extends through the wrapper 1st and has secured fast thereto a gripping piece 24, which is impervious to ordinary light, but preferably pervious to X rays, and envelops the corner of the pack, thus preventing light from passing through the perforation made by the strip 19. This corner piece may or may not be adhesively secured to the pack. I

In lieuof'the opening means just described, a corner piece 25 may be adhesively secured to the corner of the pack and will serve as a means foropening the corner, after which the pack may be fully opened with case. In the event that the corner piece 25 is constructed of amaterial impervious to X ray, the side adjacent sheet 11 may be cut out as at 26 so as not to interfere with the passage of the rays to the film.

If desired, in lieu of the corner piece 25, an opening element 27, constructed of any desired material preferably pervious to X rays,

may be adhesively secured over an entire edge portion of the pack 7, as shown 1n Fig.

-7. In this form, any desired identifying mark may be produced on the film by securing a marker 28 of material impervious to X ray upon the corner piece 25.

It willbe observed. that each of the packopenin devices above described includes a portion projecting son'iewhat from the pack which may be readily detected in the dark room and permits quick location of the opening mean.

hat I clainris: V

1. A film pack comprising a plate, flanges extending angularly from the periphery of both surfaces thereof to prod uce "therewith a pair of cup-like chambers, and an enclosed sensitized film disposed in each chamber.

2. A film pack comprising a plate, integral flanges extending at'right angles from the periphery oi? both surfaces thereof to produce therewith a pair oli cup-like chambers, and an enclosed sensitized film disposed in each chamber.

A film pack comprising a plate composed of a substance impervious to Roentgen rays, integral flanges extending at right angles from the periphery of both surfaces thereof to produce therewith a pair of cuplike chambers,and an enclosed sensitized film disposed in each chamber. 1

, 4. A film pack comprising a plate, integral flanges extending at right angles from the periphery of both surfaces'thereof to produce therewith a pair of cup-like chambers, and an enclosed sensitized film disposed in each chamber, the free edge of the flanges being .inturned and engaging the means enclosing the respective films; v

' 5. Afilm pack comprising a plate compesedo't a substance impervious to Roentgen rays, integral flanges extending at right angles from the periphery of both surfaces thereof toproduce therewith a pair of cupl'ike chambers, and an enclosed sensitized film disposed in each chamber, the free edge of the flanges being inturned and engaging the means enclosing the respective films.

6. A film pack for stereoscopicX ray work, including a plurality of enclosed sensitized films and means separate from the films for nniintaining the films fixed in such relative positions that one of the films will be unall'ected by X rays during the exposure of the other film. 1

7. A'film pack including asensitized film, an. enveloping wrapper, and a pack-opening element disposed partially within the pack and having pivotal connection with the film.

S. A film pack including a sensitized film, an enveloping wrapper, a pack-opening elemcnt having pivotal connection with the film and extending through the wrapper, and a gripping element fast to the opening element and pack.

9. A film pack including an enveloping Wrapper, a sensitized film disposed therein,

and means having connection with the film for opening the pack for Withdrawing the film therefrom.

10. A film pack including a sensitized'film having an aperture adjacent a corner thereof, an enveloping wrapper therefor, and a )ack-opening and film-holding element disposed partially within the pack and having a struck up lug extending through said aperture.

11. A film pack including a sensitized film, an enveloping Wrapper therefor, and means connected to the film for-opening the pack and for handling the film during film-developing operations.

12. A film pack including a sensitized film, v an enclosing Wrapper therefor, and a pack opening and film-Withdrawing means pivotally connected to the film.

13. A film pack including an enclosing Wrapper therefor, and a packopeningand film-Withdrawing means pivotally connected to the film and projecting through the Wrapper. V I

14. A film pack including a'sensitized film, an enclosing Wrapper therefor, a pack-opening and film-Withdrawing means pivotally connected to the film and projecting through the Wrapper, and a sealing and gripping element fast to the Wrapper and to theprojecting portion of said pack-opening-and filmwithdrawing means.

In testimony whereof, I have afiixedmy signature hereto.

EDWARD P. CRESSLER.

a sensitized film, 

